My advice right now is, that use a tighter grip at the base when you are jelqing and loosen it enough when you reach the thicker area.
Also dry jelqing the base could be useful and a different version of it where your hand doesn’t move, but you squeeze your hand rhythmically. Put your whole hand to the base and just squeeze your hand towards the glans just like you would be milking a cow.
OK. Will do. Thanks J123. I will try to do as you advised, although I have never milked a cow :)